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l TEMPERATURE CONTROLLING APPARATUS. NQ. 578,984. Patented Mar. 16,1897.

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' S. GREEN.

TEMPERATURE GUNTROLLING APPARATUS.

Patented Mar. 16,1897'.-

NVENTOR.

ATTORNEY.

UNITED Srarns Ferarri @seien SIDNEY GREEN, OF NEY YORK, N. Y.

TEMPERATULMNG APPARATUS.

SPECIFICATION forming part o Letters Patent No. 578,984, dated March 16,1897'.

Application filed June 16,1896. Serial No. 595,745. (No model.)

To all whom t may concern:

13e it known that I, SIDNEY GREEN, a citizen of the United States, and aresident of New York, in the county of New York and State of New York,have invented certain new and useful Improvements inTemperature-Controlling Apparatus, of which the following is aspecilication.

My invention relates to thermostatic regulation of temperature of rooms,buildings, dto., and particularly to heating by air-ventilation.

The object is to produce a conduit-valveoperating apparatus electricallycontrolled and constructed in such manner as to insure prompt andcertain operation and having sufiicient power to move the valve underall circumstances and having simplicity and cheapness of construction.

The novel features of my invention are hereinafter pointed out in theappended claim.

Referring to the accompanying drawings, in which like letters andfigures of reference indicate like parts throughout the several views,Figure l is a side elevation showing a three-way-conduit regulator. Fig.2 is a cross-section ot Fig. l, taken on the line a; Fig. 3 is asectional elevation showing a modiiication.

A represents a conduit leading from a source of hot air supplied fromsteam-radiating coils or otherwise located in the basement of a buildingor elsewhere.

B represents a conduit leading l'rom a source of cold air, with suitablemeans of torcing or inducing` a current.

C represents a conduit leading to an apartnient or elsewhere in abuilding either directly or through the medium of a snit-ablemixingchamber, where the alternate hot and cold inductions of air causedby the regulator are intermingled before entering the apartment.

D represents the valve, whichis ol' the sluiee type and controls bothconduits a B alternately by its respective ends.

E is an electric motor for operating the valve D, and the motor isthrown in circuit l automatically by a rotary switch F, which is soconstructed as to interrupt or break the circuit at half-revolutions ofthe crank 2. The

crank 2 engages with its pin 3 in the slot 4: ot a vibrating arm 5,pivoted at 6, and which is connected to the valve D by a connecting-rod7. rlhe crank 3 is shown at a point of stoppage at which the valve Dcloses the hot-air inlet A and opens the cold-air inlet B. The oppositepoint of stoppage of the crank 2 on its half-revolution will reverse theposition of the valve D, closing the cold-air inlet B and opening thehot-air inlet A full open, there being no intermediate points ofstoppage.

The shaft 8 of the motor E is worm-geared to the gear-wheel 9, mountedon the shaft l0, carrying the switch F, and therefore acquires greatpower mechanically lor a small and economical size of motor, l'orcingthe valve to operate under all conditions, as, for instance, whenclogged or obstructed by rust or disuse or from crude construction.Accurate and expensive mechanical construction is avoided.

rlhe switch F is composed of a disk of insulating material l1, havingconductingplates l2 i3, connecting electrically to strips le 15,respectively, which strips are insulated from one another and come intocontact alternately with the contact-spring 16, which is connected toone pole of the circuit 1. The plates l2 13 have permanent contact withthe springs 17 18, which connect with respective branches 20 2l ot thecircuit l.

G represents a battery or other source of electric energy.

H represents a thermostatie switch, of any well-known or suitableconstruction, located in the apartment to be heated.

The apparatus is shown in a position assumed immediately after thethermostat Il has been actuated by temperature above the normal, closingcircuit through branch 2l, spring 1S, plate 13, strip 15, spring 16, andcircuit l, actuating the motor E bythe energy from the battery G untilthe crank 2 has been rotated to the uppermost position shown, closinghot-air conduit A, and opening coldair conduit 13. lNhen the apparatushas reached the above position, the contactspring 1G has passed ott fromthe strip l5 and onto the strip l-l, breaking the circuit formed bythethermostat l1. As soon as the temperature falls below the normal thethermostat ll becomes reversed and closes circuit through branch 20,spring 17, plate l2, strip 1i, and spring 1G, and circuit l againactuating the motor E, the same rotating in the IOO same direction asbefore, moving the crank 2 a further half-turn to its lowest position,closing the cold-air inlet B, and opening the hot-air inlet A.

An advantage afforded bythe construction ot' device shown consists inthat the crank l acts on the long radius of the arm when rising, asindicated by the arrow in Fig. 2, and lifting the weight of the valve Dand eennected parts, while in `falling the said crank acts on theshorter radius of the arm 5 when passing the point indicated by thearrow 3l and while the weight ol' the descending parts assists themovement. The liabilityto stick is still 'further reduced thereby. rlhematter of mechanical power is of importance in operating valves of largesize without requiring expensive or extrem el yacenrate construction.

ln Fig. 3 the operating device is applied to pivoted valves D D2,connected by rods Ll() Lil to the vibrating arm 5, the mode of operationbeing the same as hereinbefore described. The crank 2 in Fig. 5 acts onthe long radius of the arm 5 in rising, as before, when it lifts thevalves. ln the instances of all the figures the valves are locked by thedead-center position of the crank 2 at its points of stoppage, aud atthe same time exact points of stoppage are unnecessary for thesuccessful operation of the device.

Having thus fully described myinvention, what l claim, and desire tosecure by Letters Patent, isn

The combination with a valve having resistance of movement in onedirection, et an electric motor for actuating said valve, a rotary crankoperated by the motor and acting en a vibrating arm connected with saidvalve so that a long radius o the arm is engaged in moving the valveagainst its resistance and a short radius of the arm is engaged when thevalve is moved in an opposite direc tion, an electric generator, a maincircuit, a circuit-closer, and an electric switch operated bysaid meterand electrically connected with the motor-operating circuit whereby thesaid crank is arrested at a point intermediate to its range of travel onsaid vibrating arm.

Signed at New York, in the eenntyef New York and State oi' New York,this 23d day el' April, A. D. 1800.

SDNEY GREEN.

lVitn esses:

G. Fauvel; GoUnaUn, lI'nNnv Pixnknn.

